Fix the TabScrubber always starting from the first tab in full screen mode.

chrome/browser/ui/views/frame/immersive_mode_controller.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
@@ skipping 32 matching lines @@
   enum class Type {
     ASH,
     STUB,
   };
 
   class Observer {
    public:
     // Called when a reveal of the top-of-window views has been initiated.
     virtual void OnImmersiveRevealStarted() {}
 
+    // Called when a reveal of the top-of-window views has finished.
+    virtual void OnImmersiveRevealEnded() {}
+
     // Called when the immersive mode controller has been destroyed.
     virtual void OnImmersiveModeControllerDestroyed() {}
 
    protected:
     virtual ~Observer() {}
   };
 
   explicit ImmersiveModeController(Type type);
   virtual ~ImmersiveModeController();
 
@@ skipping 58 matching lines @@
 };
 
 namespace chrome {
 
 // Implemented in immersive_mode_controller_factory.cc.
 ImmersiveModeController* CreateImmersiveModeController();
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_